I'm currently helping set up a wiki for students of a STEM faculty, and we've settled on MoinMoin (v2, that is). We're broadly building on a previous MediaWiki

I'm currently helping set up a wiki for students of a STEM faculty, and we've settled on MoinMoin (v2, that is). We're broadly building on a previous MediaWiki setup, which we've found to be too "Wikipedia-oriented". I've looked at a few very extensible and featureful wikis (XWiki, Tiki Wiki, TWiki, Foswiki), but for our usecase, they seemed overwhelmingly big (I know, I'm not easy to please). They're all almost application development/scripting platforms, which isn't necessarily a bad thing, but it would mean we'd have to learn a lot more if we wanted to modify parts of them. Of the four mentioned, XWiki looked like the most "polished", its conceptual model and code looked maintainable and it has a great number of actively developed plugins. If I'm not mistaken it even allows writing pages in Markdown, which was one of our criteria. I also looked into taking a very lightweight wiki (LOC in the high thousands) and adapting it to our needs, but found that most of those didn't have a code model that would lend itself well to doing things like swapping out a custom format for Markdown, we'd basically be rewriting half the wiki at that point. Even DokuWiki, a relatively large project, is too blasé about running regexes on page contents for my taste. We looked into BookStack, but didn't think its content model would work too well for our idea of a wiki as a "social" site. Maybe it's just the terminology, though. In the end, we ended up running MoinMoin 2. It's in a perpetual beta state, but it is actively maintained. The main reason was its code quality: It's small enough that understanding how it all fits together is quick, and it's structured so that adding functionality or swapping out one part of it is easy (as much as it could be for software that's over a decade old, anyway). We're programmers anyway, so we decided to go with the ability to change the wiki to our liking over initial polish. So far, I've made a new theme, wrote a script for migrating from MediaWiki, changed out the Markdown parser and added SSO with CAS. The changes aren't public yet, but will be soon. So far I'm happy with our decision, but note that my search was heavily subjective, you very likely have other requirements and preferences. EDIT: By the way, the criteria were loosely: - Modifiability (I wanted a custom theme, needed a non-traditional SSO option and could see us getting ambitious about custom functionality) - Hierarchy + ideally tags for organising - Ability to export some pages into a print version (annually published leaflet/book for new students) - Permission system (which we hopefully won't need to use) - Storing pages in Markdown (helps with converting for print too) - Macros (I'm a fan, easy-to-write extensions would be just fine)